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Xcode stuck at “Your application is being uploaded”

... from Xcode to the App Store. I have done everything regarding my project, and its running fine on my iPhone and iPad. But when I submit my project I am facing a huge problem. ...
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How do multiple clients connect simultaneously to one port, say 80, on a server? [duplicate]

I understand the basics of how ports work. However, what I don't get is how multiple clients can simultaneously connect to say port 80. I know each client has a unique (for their machine) port. Does the server reply back from an available port to the client, and simply state the reply came from 80? ...
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How to search file text for a pattern and replace it with a given value

I'm looking for a script to search a file (or list of files) for a pattern and, if found, replace that pattern with a given value. ...
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When to use volatile with multi threading?

...riable volatile to prevent the compiler caching the variable in a register and it thus not getting updated correctly. However two threads both accessing a shared variable is something which calls for protection via a mutex isn't it? But in that case, between the thread locking and releasing the mut...
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Does JavaScript have the interface type (such as Java's 'interface')?

...ect with the proper methods, which would make it conform to the interface, and then undefine all the stuff that made it conform. It'd be so easy to subvert the type system -- even accidentally! -- that it wouldn't be worth it to try and make a type system in the first place. Instead, JavaScript us...
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Benefits of prototypal inheritance over classical?

So I finally stopped dragging my feet all these years and decided to learn JavaScript "properly". One of the most head-scratching elements of the languages design is it's implementation of inheritance. Having experience in Ruby, I was really happy to see closures and dynamic typing; but for the li...
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How to “hibernate” a process in Linux by storing its memory to disk and restoring it later?

... would to write all the memory used by a process to disk, free up the RAM. And then later on, I can 'resume the process', i.e, reading all the data from memory and put it back to RAM and I can continue with my process? ...
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What is token-based authentication?

I want to understand what token-based authentication means. I searched the internet but couldn't find anything understandable. ...
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Is using a lot of static methods a bad thing?

...eep track of internal states. For example, if I need to transform A into B and don't rely on some internal state C that may vary, I create a static transform. If there is an internal state C that I want to be able to adjust, then I add a constructor to set C and don't use a static transform. ...
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Benchmarking (python vs. c++ using BLAS) and (numpy)

I would like to write a program that makes extensive use of BLAS and LAPACK linear algebra functionalities. Since performance is an issue I did some benchmarking and would like know, if the approach I took is legitimate. ...